incrediBILL - 2:53 pm on Sep 12, 2013 (gmt 0) [edited by: incrediBILL at 2:56 pm (utc) on Sep 12, 2013]
That sure sounds like cloaking to me.
Not only that, if they're advertising that price they're required by law in many areas to honor it so if your regular customers ever catch them using Lynx or something...
At any rate the FTC would fry them IMO.
An easy way to possibly solve the problem would be to make your crawler send a standard browser user agent string assuming they aren't checking for your IP address as well. If they think it's a browser maybe they'll give you the right price.
[edited by: incrediBILL at 2:56 pm (utc) on Sep 12, 2013]